Electric transformer and connections.



PATENTED FEB. 6, 1906.

H. F. PROVANDIE, ELECTRIC TRANSFORMER AND CONNECTIONS.

APPLICATION FILED NOV. 11, 1904.

2 SHEETSSHEET l.

.lkventoi I fa y No. 812,089. PATENTBD FEB. 6, 1906.

H. P. PROVANDIE.

ELECTRIC TRANCPORMER AND CONNECTIONS.

APPLICATION FILED NOV. 11, 1904.

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610 ;with the secondary coil or winding, of a series UNITED STATES PATENT OF ICE.

HERBERT F. PRovANDIE, OF-MELROSE, MASSACHUSETTS.

ELECTRIC TRANSFORM-ER AND 'couuEorlons.

vented a new and useful Combined Electric Transformer and Connections, of which the the combination,

of separate electric connections at points along its len th, a series of separate metal buttons .each in separate electrical connection with one of said separate electric connections. of. the secondary coil, and a metal switch in electric connection with one of the said elec tric connections of the secondary coil and ar ranged or adapted to be placed in and out of i electric connection with anyone of said-butbe desired.

tons, and all so that with a predetermined ratio or proportion of said electric connections between said buttons, said switch, and said secondary coil voltages of correspondingly.

different and determined presures can be accuredfrom one and the same secondarycoil to be transmitted with suitable electricconnections for a use or an application, as may In the accompanying plates of drawings this invention is illustrate v Figure I. is a plan'view of a metal buttons, an electric switch common to all of said *buttons, and electric connections between said'buttons, a switch, and secondary and primary coils, all and severally shown as arranged on a wooden board or. table com mon. to all. Fig. 2 is a side elevation of the parts illustrated in Fig. 1,. but with some parts broken out and in vertical section. Fig. 3 is a central horizontal longitudinal section of the transformer, showing its interior con- I struction. Figs? 4 and 5 are diagrams, as

hereinafter explained.

, In the drawings, A is a cylindrical shell of soft irori closed at itsbpposite ends by iron This shell is supported horizontally f and at its opposite closed heads or ends .on wooden standards B B, both attached to a common base board Cof wood. This shell A contains a primary winding or coil D and a secondary winding or c011 E, and the former "or primary coil is wound around and about the latter or secondary coil, which in turn is about a central core F. This core IM'smade gap of bunched iron wires or rods extend n icngthwise of and within the secondary col Specification of Letters Patent. 7 Application aim Hovomber '11, 1904. Serial No. 232,365.

transformer,

Patented Feb. 6, 1906.

and at each end these wires are severally sup: ported in wooden heads G G, and between these heads the primary and secondary windings or coils extend and areiconfined.

a is the insulation-of any suitable material about the secondary coil E and between it and the primarycoilD;

a, is the insulation of any suitable material about the outside of the primary coil D and the wooden heads G,

a is the insulation of any suitablematerial about the core F and between it and the secondary coil E, and a is the insulation of any s'uitablematerial about the wires leadingfromthe coils to the outside ofthe shell.

The two coils, core, and wooden heads, all

as above described, are contained Withih the shell A, and thereabout and between the wooden headsGG, the ends of the core F, and

the heads of the shell A and the insulation a, E

surrounding the primary coil D, and between it and the shell the shell and said parts as a whole-are surrounded with and packed about with filings or'small particles of iron H.

in the arc'of a circle at one end'upon thetable-board-C. 1

Y -K is a horizontal arm or switchfiwith a wooden handle K This switch is iulcrumed on a vertical pin K secured to table C, and it is arranged so that as it is swung on its fulcrum it will moveover and in close contact with the several buttons J J & c.

primary coil and any suitable source of alternating electric currents. The binding-posts N N are electrically connected by wires P P,

I the one, N, by wire P to'one end or pole of the secondary coil E and. the other, i by wire? to the'metal plate L, on which the arm or switch K beais. Again, the bindingposts N N are electrically connected by wires Q Q, as may be desired or necessary'for the use or purpose, in connectiontwith which the elect c c rr nt from the'secondary coil isto b I usedor adapted. I v v Eachbutton'J J ,&c. isconnectedbya sep- -J JJ U J are a series of separate or detached metal buttons, preferably arranged several intermediate math ivire RR R R R respectively, to the I second :ry coil E, and the connection of the fimtton J with said'coil' is at its end or pole-oppp'site, to that connected to the binding-post re by wire P, and the conriecti on of the other buttons J J Jf-J with said coil E is in each instance at a point thereof intermediate of or between said two end connections, and these oints of connection may be either at regu ar or equal distances apart, as is shown, Figs. tend 5, or at irregular or unequal distances apart. I The several wire connections between the binding-post N andthe buttons J J &c., an secondary coil- E, as also: the connection between bindingpost N and plate L, are shown in Fig. 1 by dotted lines and in the diagrams Figs. 4 and 5 by full lines.

S S are stops at opposite sides of the switch Kand secured to t e base-board O to limit the swing of the switch in either direction.

The diagram Fig. 4 shows the secondary coil E as a whole in one continuous winding from end to end, whereasin the diagram Fig. 5 it is shown as in separate windings, corresponding to the intermediate wire connec: tions of the coil therein shown, as also in Fig.

i 4, and these separate windings'constitute as a whole the secondary coil E, and-each has one end connected by wire to its respective-bub ton-head J Jfl'J, oitJ as the case may be,

- ventionasan electric transformer. The diagram Fig. tshows the secondary coil E as one wholeand in a continuousand 'simliar winding throughout its whole len thi.

The diagram Fig. 5 shows the secon ary coil E, as it were, in similar-rand separate sections or windings electrically continuouswith each other, and a? isinsulation of any suitable material in separate pieces and about .and' around and extending between, said sections;

From theforegoing description of the arts,

their respective constructions and re ativp arrangement as .to each other and all and seve'rally making u the electric transformer,

and the several e ectri'c connections with the primary and secondary coils or windings -switch, and metal, buttons, and otherwise all asset forth, it is plain that with the switch on any one of the buttons J J &c',, an electric current is thereb established through. the

secondary coil an such buttonand thence to and through the device, apparatus, or what ever other appliances, &c., in connection watts in the with which the same is to be used, and so with a predetermined ratio or proportion of said electric connections between said. buttons and the secondary coil repres, ted by the number of windings in a single ection or in the combination of two or more sections of the secondary coil, voltages of correspond ingly different and determined pressures can be secured firom one and a common secondary coil of the transformer, the same being trans- 'mitted through the electric connections at the binding-posts for use or application as desired.

One example of, the utility of this invention is for the'heating of'a cauterizing instrument which'therefor is suitabl electrically connected at the binding-posts T N. Again,

one adaptation of this invention for practical urpose is with awinding of the primary coil or a. pressure of one hundred and'thirteen i-olts and a carrying capacity'of five amperes, making five undred and sixty-five rimary coil, requiring eleven hundred and- 'ty turns, and this would produce in the secondary winding or coil a quantity of current at any pressure in the secondary coil, the windings of which aredirectly proportional to the primary winding or coil.

For illustration, with eleven hundred and fifty turns inthe, primary coil and 10.2 ampere-turns in the secondarycoil it would be possible to draw from this secondary unit on a dead-shot circuit of the secondary the same quantity of current as the primary would take at full -load-to wit, five hundred and sixty-five wattswith a loss of two per cent. and this pressure in the secondarybeingfone volt; but if the turns in the secondary are in direct proportion to "the primarywindings any voltage can be obtained in the secondary from unity upward and without limit, as may be desired. 7 Again, allelsebeing properly adjusted, as has been explained, plainly d' ferent ressures'or voltages of current can be. secured from one and the same secondary coil and similarly through the eauterizing instrunent, if that is the instrument in connection as stated, by simply suitably manipulattng'the switch, an d, again,-that these different pressures or voltagps will be varied according to 'the button of e series of buttons having the switch closed upon itand as follows-to wit,. with the switch closed upon thebutton J- the pressure would be one volt, with e switch closed upon the button J the wpuld be two volts,'with the switc (closed upon the button. .1 the pressure would be three volts, withthe switch closed upon the button? the pressure would be four volts, and with the switch closed upon the button J v the pressure would be five volts, the highest pressure or voltage under the conditions above'ex lained and with the number 01 s ctions of t e secondary coiland buttons Snu an and described. However, it is evident that :1- alias and in a manner well known and'und'er ondar v oppos te ends of the'core, insu' ation 0 prithe secondaryecoil sectionsand separate but-' tons to correspond therewith may be in-' creased or decreasedin number at pleasing and, aga i n, thatthe secondary-coil sections. may vary or differ as to their respective ampere-turns and that the initial pressure of the, alternating or, intermittent current through the primary coil may be more orles's than one hundred and thirteen volts, as above stated,

stood. by'electricians, and therefore needing no-lparticulardescription herein; Q

- t may be: well to-here observe that one side of each of the severallsections of the'sec ondary coil are commonto one another and act asone side of the transformed current and that the other side oi the'severalsections of the secondary coil are se arately connected in the -order of their regtive voltages to the metal button's J J &c.,"-co mmonl known as rheostat-buttons, and a switc or arm which closed across one'of said buttonsfcom-- pletes-the other-side of the transformed" current.

Having thus described my invention, what I claim, and desire to secureby-Letters Pat; ent, is- I A primary coil or winding, a secondary coil or wmdin within the primary coil, a core of bunched ongitudinal wireswithin the secportin the coil, Wooden heads su mary an'd secondary coils and ofpcore and sec ondary coil, and surrounding primary coil, a

paclged within the shell about the insulation surrq mdmg the orimarv coil in comb1na,

. v4 from one pole and anot er from the o posite ne'sses.

closed shell or case contammg prima and secondary coils, core andwoode'n hea s and insulations, and 1I'OI1 particles tion with insulated elect 'c wires, one leading- 'pole'of the rimary coil and res ective yconnected to t e opposite poles 0 any suitable source of electric energy, a series of'electric' insulated electric wires, one concontacts each of the. electric contacts and nected tl) the othe'rsconnected to the secondary e il,

but severally at se arateintermediate poi ts and at Jone end on y of, its length, insulated electric wires severallyconnected to the secondary coil at intermediate points of its length and to the electric insulated wire leading from one pole of the Erimary coil, an electric switch arranged to e placed in and out of contact with each ofsaid electric contacts,

and an insulated electric wire connected-to said switch and .to a binding-post separate from the bindingqlio'stconnected to one pole of the rimary' coi all as substantially as de scribe and for use and operation and purposes specified. t

In witness whereof I have hereunto set my hand in the presence of .two subscribing wit- HERBERT F. PROVANDIE.- Witnesses:

. CHARLES 'J. SMITH,

I ALBERT W. BROWN- 

